Pretty much every statement in that post is complete and utter garbage. The Luftwaffe NEVER had air superiority over the Channel. They were never able to operate freely over the Channel except close to the French coast.
Regardless, what does air superiority over the Channel have to do with the UK's ability to rescue downed pilots? Have you ever heard of these things - apparently they were rather successful:
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You say there was danger for British fighters being bounced over the Channel...but that's EXACTLY where the UK's "useless" radar was looking, and the air defence network could warn any formation before being bounced.
Radius of action for British and German fighters may have been limited (compared to the later P-51, for example) but it wasn't so short that operations couldn't be maintained over the Channel.